Nothing , 0 diference on + or - . Today i was make 40 km in city trafic and this heavy sound is little tiring and now i got headache . I need buy ear plugs or install db killer if i will go to some trip outside town . But huge advantage is all car drivers can hear and feel me ( yes is like...
Ok work is done , i goes to Yamaha oficial shop ( Poland Position ) , they it make in 40 mim , mechanic say it was easy and make it rly clean , look like oem .
Sound it awsome it is rly loud without db killer . It sound like V8 Mustang with sport exhaust like you know what i mean . I make video...